In this course -- through a combination of video lectures, demonstrations, and hands-on practice -- you’ll learn about the main components of an operating system and how to perform critical tasks like managing software and users, and configuring hardware.
By the end of this course you’ll be able to:
● navigate the Windows and Linux filesystems using a graphical user interface and command line interpreter.
● set up users, groups, and permissions for account access.
● install, configure, and remove software on the Windows and Linux operating systems.
● configure disk partitions and filesystems.
● understand how system processes work and how to manage them.
● work with system logs and remote connection tools.
● utilize operating system knowledge to troubleshoot common issues in an IT Support Specialist role.

SI

It took some time to due to lap graded assignments.However finally enjoyed the course specially the remote connection section and Linux and windows operating system files and folders troubleshooting.

TA

Mar 24, 2018

Filled StarFilled StarFilled StarFilled StarFilled Star

Excellent advice on carving it in a stone and being too stubborn to quit. So much of what is seen is sugar coated instasnap filtered that hearing Leverage your Strengths and work hard is reassuring.

From the lesson

Users and Permissions

In the second week of this course, we'll learn about configuring users and permissions in Windows and Linux OS. As an IT Support Specialist, it's important to know how to grant the appropriate permissions to users and groups for both Windows and Linux OS. By the end of this module, you will know how to add, modify, and remove users for a computer and for specific files and folders by using the Windows GUI, Windows CLI, and Linux shell.

Taught By

Google

Transcript

In Linux, we change permissions using the chmod, or change mode, command. First, pick which permission set you want to change. The owner, which is denoted by u, the group the file belongs to, which is denoted by a g, or other users, which is noted by an o. To add or remove permissions, just use a plus or minus symbol that indicate who the permission affects. Let's take a look at some examples. So that's chmod u+x my_cool_file. This command is saying that we want to change the permission of my_cool_file by giving executable or x access to the owner or u. You can do the same thing if you wanted to remove a permission. So, chmod u-x my_cool_file. Instead of a plus, we just minus. Pretty simple, right? If you wanted to add multiple permissions to a file, you could just do something like this. This is saying we want to add read and execute permissions for the owner of my_cool_file. And you can do the same for multiple permission sets. You do chmod ugo+r my_cool_file. Now, this says we want to add read permissions for our owner, the group the file belongs to, and all other users and groups. This format of using rwx and ugo to denote permissions and users in chmod is known as symbolic format. We can also change permissions numerically, which is much faster and simpler, and lets us change all permissions at once. The numerical equivalent of rwx is 4 for read or r, 2 for write or w, and 1 for execute or x. To set permissions, we add these numbers for every permission set we want to affect. Let's take a look at an example. The first number 7, is our owner's permission. The second number, 5, is our group permissions, and the third number, 4, is the permission for all other users. Wait a minute, where are we getting 5 and 7? Remember, you have to add the permissions together. If you add 4, 2, and 1 together, you get rwx, which equals 7. So our owner permission is able to read, write and execute this file. Can you guess what 5 would stand for? That's right? 4 plus 1 is read and execute. So now, you can see how numeric format is quicker than symbolic format. Instead of running something like this, We can run chmod 754 my_cool_file to update them all. Either way, you can change permissions using the symbolic or numerical format. Just pick whichever is easiest for you. You can also the owner and the group of a file. The chown or change owner command allows you to change the owner of a file. Let's go ahead and change the owner to Devan. Awesome. And Devan is the owner of this file. And to change the group of file belongs to, you can use a chgrp or change group command. Awesome. Now, the best group ever is the group owner for this file. It may take a while for you to get the hang of reading and changing permissions. You can practice changing the permissions on a few files until you get it down. Permissions are an essential building block to computer security, and you'll be using it throughout your work as an IT Support Specialist.

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